Putter head



FIG. 1 is a front plan view of my new design;

FIG. 2 is a is a rear plan view of my new design;

FIG. 3 is a top plan view of my new design;

FIG. 4 is a bottom of my new design;

FIG. 5 is an end plan view of my new design; and,

FIG. 6 is an end plan view of my new design as seen from the left in FIG. 1. 

The ornamental design for a putter head, as shown and described. 